3 years ago

Select the correct answer.

Physics

2 answers:

polet [3.4K]3 years ago

6 0

A car traveling south is 200 kilometers from its starting point after 2 hours. What is the average velocity of the car?

Choose: 100 kilometers/hour south

zzz [600]3 years ago

6 0

Answer:

100 kilometers/hour its d

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The drift velocity of the electrons in this case is c) 5.52 x 10-4 m/s

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First of all, we need to find the volume occupied by 63.3g of copper, so $V=\frac{m}{\rho}= \frac{0.0633Kg}{8,900kg/m^{3}} =7.11 \times 10^{-6} m^{3}$ , then if we assume each atom of copper contributes with one free electron to the material body $n=\frac{N_{A}}{V}=\frac{6.02 \times 10^{23} electrons}{7.11 \times 10^{-6} m^{3}} =8.46 \times 10^{28} electrons/m^{3}$ .

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3 years ago

What do wind and water do to rocks at the surface?

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4 years ago

Read 2 more answers